Units of luminance

Candela per square metre

The candela per square metre (symbol: cd/m2) is the unit of luminance in the International System of Units (SI). The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. The nit (symbol: nt) is a non-SI name also used for this unit (1 nt = 1 cd/m2). The term nit is believed to come from the Latin word nitēre, "to shine". As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. The sRGB spec for monitors targets 80 cd/m2. Typically, monitors calibrated for broadcast or studio color grading should have a brightness of 100 cd/m2 in Japan and in the United States, or 120 cd/m2 in the European Union. Most consumer desktop liquid crystal displays have luminances of 200 to 300 cd/m2. HDR displays range from 450 to about 1600 cd/m2. (Wikipedia).

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Related pages

Orders of magnitude (luminance) | Skot (unit) | Area | Candela | Apostilb | Luminous intensity | Metre | SI base unit | Square metre | Bril (unit) | SRGB | Foot-lambert | Stilb (unit) | Lambert (unit)